A Binkyberry is a person, who can not live without their smart phone. It goes to work with them, to bed with them, they look at it constantly even during a conversation or at dinner. Everyone remembers their binky. It was the blanket or shred of what was left of their very first baby blanket. This was something they almost took to kindergarten with them.
She/he almost left for work with out their keys, wallet or purse. She/he did have their smart phone though and had to go back home for the other items they left behind. They certainly had their Binkyberry though.